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1.1 root 1: /* (-lgl
2: * COHERENT Version 3.0
3: * Copyright (c) 1982, 1990 by Mark Williams Company.
4: * All rights reserved. May not be copied without permission.
5: -lgl) */
6: /*
7: * Machine dependent definitions.
8: * 8086/8088 Coherent, IBM PC.
9: */
10: #ifndef __SYS_MACHINE_H__
11: #define __SYS_MACHINE_H__
12:
13: #include <common/feature.h>
14: #include <sys/const.h>
15: #include <sys/types.h>
16:
17: /*
18: * Offsets for registers.
19: */
20: #define OIP -3
21:
22: /*
23: * Functions.
24: * blockn - block number from byte number
25: * blocko - block offset from byte number
26: * nbnrem - offset into indirect block from block number
27: * nbndiv - residual indirect mapping from block number
28: * btocru - byte to click (saddr_t) rounding up
29: * btocrd - byte to click rounding down
30: * bruc - byte rounded up to click boundary
31: * ctob - click to byte
32: * ctokrd - click to Kbyte rounding down
33: * stod - saddr_t to daddr_t conversion for swapper.
34: */
35: #define blockn(n) ((n)>>9)
36: #define blocko(n) ((n)&(512-1))
37: #define nbnrem(b) ((int)(b)&(128-1))
38: #define nbndiv(b) ((b)>>7)
39: /* A click is a 16 byte paragraph, but they are allocated in chunks
40: * of 512 bytes so that disk and memory segments have same granularity.
41: */
42: /* The following macros are no longer valid in protected mode.
43: * #define btocru(n) ((saddr_t) (((n+511)>>9) << 5))
44: * #define btocrd(n) ((saddr_t) ((n)>>4))
45: * #define bruc(n) ((n+511)&~511)
46: * #define ctob(n) ((n)<<4)
47: * #define ctokrd(n) ((n)>>6)
48: * #define stod(n) ((daddr_t)((n)>>5))
49: */
50:
51: /*
52: * Simple functions.
53: */
54: #define msetppc(v) (((int *)((char *)&u+UPASIZE))[OIP] = (v))
55: #define sxalloc(s, f) ((f&SFHIGH)?shalloc(s):smalloc(s))
56: #define vsegpair(v) (v),sds
57:
58: /* The following macro is no longer valid in protected mode.
59: * #define psegpair(p) (int)((p)&0xF),((int)((p)>>4))
60: */
61:
62: /*
63: * For mapping auxiliary segment in exec.
64: */
65: #define asave(o)
66: #define arest(o)
67: #define abase(s) (sas=s, 0)
68: #define adone(s)
69:
70: /*
71: * Buffers are not mapped.
72: */
73: #define bsave(o)
74: #define brest(o)
75: #define bmapv(p)
76: #define bconv(p) (p)
77: /* #define bvirt(p) (p-ctob(sds)) */
78:
79: /*
80: * Clist are not mapped.
81: */
82: #define csave(o)
83: #define crest(o)
84: #define cmapv(p)
85: #define cconv(p) (p)
86: #define cvirt(p) ((CLIST *)(p))
87:
88: /*
89: * Drivers are not mapped.
90: */
91: #define dsave(o)
92: #define drest(o)
93: #define dmapv(s)
94: #define dvirt() 0
95: #define dcopy(dst,src)
96:
97: /*
98: * Register structure.
99: */
100: typedef union mreg_u {
101: unsigned m_reg [1];
102: unsigned m_int;
103: } MREG;
104:
105: /*
106: * Segmenation prototype.
107: */
108: typedef struct mproto {
109: saddr_t *mp_cbp;
110: saddr_t *mp_dbp;
111: unsigned mp_csl;
112: unsigned mp_dsl;
113: vaddr_t mp_svb;
114: vaddr_t mp_svl;
115: } MPROTO;
116:
117: /*
118: * Set jump and return structure.
119: */
120: typedef struct menv_s {
121: int me_di;
122: int me_si;
123: int me_bp;
124: int me_sp;
125: int me_pc;
126: int me_fw;
127: int me_depth; /* stack depth */
128: } MENV;
129:
130: /*
131: * Context structure.
132: */
133: typedef struct mcon_s {
134: int mc_di;
135: int mc_si;
136: int mc_bp;
137: int mc_sp;
138: int mc_pc;
139: int mc_fw;
140: int mc_depth; /* stack depth */
141: } MCON;
142:
143: /*
144: * General register structure.
145: */
146: typedef struct mgen {
147: } MGEN;
148:
149: #if __KERNEL__
150:
151: /*
152: * Global variables.
153: */
154: extern unsigned sas; /* System auxiliary segment */
155: extern unsigned scs; /* System code segment */
156: extern unsigned sds; /* System data segment */
157:
158: extern saddr_t uasa; /* Currently active uarea segment */
159:
160: #endif /* __KERNEL__ */
161:
162: #endif /* ! defined (__SYS_MACHINE_H__) */
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